Steam oven



FIG. 1 is a perspective view of a steam oven showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top view thereof.

The broken line portions in FIGS. 1-7 represent portions of the steam oven that form no part of the claimed design. The bottom view of the steam oven is omitted since it does not contain ornamental features. 

CLAIM The ornamental design for a steam oven, as shown and described. 